Added /lab stats, it displays the new leaderboard. You can also specify a player name, though it's pretty useless, for now.
Added an optional parameter to /lab spawn that specifies the amount to be spawned.
/lab clear no longer disable every boss (this command will be reworked/removed along with /lab info in a near future).
Configuration:
Minecraft drops can now be overwritten instead of being appended to boss drops (note that it may also overwrite any drop added by other plugins, depending on priorities).
Added configurable immunities.
Added Command.Spawn.Max which limits the maximum number of spawnable boss per use.
Added Task.RetrieveBossList, representing the frequency at which the boss list used by other tasks is updated.
Added Task.SavePlayerData, representing the frequency at which the player stats are saved to the hard drive.
API:
Added a BossDeathEvent which allows to modify exp and drops.
Added a BossSpawnEvent.
Fixed a bug that prevented drops to be added to the list.
Fixed a bug that prevented new task values to be read on the first /lab reload.
Fixed (I hope) NullPointerException in CheckBossHealth.java and CheckBossProximity.java.
